The Omega Stone extends the adventure experienced in its predecessor, Riddle of the Sphinx, in which players were left with the question, "Did Sir Geoffreys actually find the illusive Ark of the Covenant?"
The quest leads beyond Egypt to some of the world's most famous locations. Search and explore Chichen Itza, Stonehenge, Easter Island, and Bimini in the Devil's Triangle, all of which are reproduced with pre-rendered graphics or still photographic images.
The adventure is played from first-person perspective, in Myst style. The game features a point-and-click interface, atmospheric effects (rain, wind etc.), cutscenes with live actors and in-game animations, and many mysterious puzzles to solve.